Spark

A breadboard and a few parts, with one Uno blink at the start and no processor after it. What current, voltage, time and logic really do.

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One board, twenty pins and a C++ sketch. From a lamp you switch to a game you can play.

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A 32 bit RISC-V board at 160 MHz. Its own peripherals, its own 3.3 V rules, and a console at the end of it.

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A dual core Cortex-M0+ at 125 MHz. PWM on every pin, a 64 bit clock, and pins that do not forgive 5 V.

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One button to a full leverless controller on a Pico: SOCD, eight buttons, lit buttons, an OLED and modes.

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A Cortex-M4 at 84 MHz, where a pin is a port and a number and every peripheral starts with its clock switched off.

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The language, one idea per lesson, on a board that shows you what your code did.

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Build logic from individual gates, then make a bit persist, count and move through a register.

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Read people and sensors without blocking, control an output, then finish with two playable builds.

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Start with one NAND gate, package every circuit you build into a chip, and use your chips to build the next one: an adder, memory, a CPU of your own, and a computer that runs your program.

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Build a real arcade claw machine piece by piece, from one stepper motor to coins, a clock, a win sensor, lights and sound.

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Build a real vending machine piece by piece: a keypad, a screen, coins and change, spirals, a drop sensor and service mode.

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Three lessons on a two-wheel self-balancing robot: read its tilt, see what the wheels do to it, and write the PID that stands it up.

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Five porch props on the Uno, from a fog trigger to a talking skull, each one a complete build with the safety notes that go with it.

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Four holiday builds on the Uno, from a star on the tree to a light show synced to a song, each one ready to hang up.

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Wire a color screen, buttons and sound to an ESP32-C3, one working step at a time, and finish with three games you can play.

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Follows the fifteen projects in the official Arduino Starter Kit book, in its order, each one running in your browser.

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Follows the lessons in the Elegoo Uno R3 Super Starter Kit tutorial, in its order, each one running in your browser.

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Follows the lessons in the Elegoo Uno R3 Most Complete Starter Kit tutorial, in its order, each one running in your browser.

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A Tamagotchi-style pet on an OLED: a screen, buttons, stats, a clock and a memory, ending with Pip.

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Animated eyes on a round display that blink, feel, react to touch, tilt and light, ending with a robot that misses you.

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Bring up a barometer and an IMU, catch apogee, then fly a full state machine that logs to microSD.

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Drive by counting wheel slots, see hazards, do the science, then send your rover on a full mission.

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Aim a dish with a stepper and a servo, predict a pass from an orbit model, then track it across the sky.

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Arming switches, a mission display, a countdown, an engine and a master alarm, then fly the whole panel to orbit.

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A keypad, a magnet key, an RFID card, a tilt sequence and a light puzzle, each one a lesson, then the whole box with its lock.

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From two flipper buttons to a full table with a kicker, lights, sound and a saved high score, on a Mega.

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Pull a real arcade lever, spin three OLED reels and pay out by a table whose odds you can check, on an Uno.

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A light saber style sword in three builds: a blade that ignites, motion you can hear, then the whole hilt with a sound font.

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An arc reactor style chest light and a moving faceplate in three builds: the glow, the helmet, then the whole suit.

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A rhythm game in three builds: notes that fall in time, buttons that judge your timing, then the whole game with combos and a high score.

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Sixty-four LEDs from twenty wires in three builds: a shift register, multiplexing slowed down, then a cube full of animations.

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Four builds on the Uno for New Year’s Eve, Valentine’s Day, Diwali and Hanukkah, each one ready to put in a window.

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Template a button box, a shifter with a handbrake and a flight panel on a Pro Micro before you buy the parts.

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Scan a key matrix, see ghosting and the diode that stops it, then add layers, a knob and per-key light.

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Build the sensors and switches people put around the house on an ESP32-C3, and see how each reading reaches Home Assistant.

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Throw turnouts, run a level crossing, follow a train with block signals and drive a DC loco with momentum, all from an Uno.

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Learn what a printer’s firmware does underneath: homing, temperature control with safety, G-code motion and runout detection.

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Twelve keys, a volume knob, three layers and a screen on a Pro Micro that plugs in as a keyboard.

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Faders, drum pads, a knob and an encoder on a Pro Micro, sending real MIDI bytes you can read.

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A web dashboard on an ESP32-C3 that switches relays, reads sensors and runs schedules from a clock.

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Light sensors and servos aim a panel, an INA219 measures it, and a fair experiment compares tracked with fixed.

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Skin response and heart rate against a calm baseline: a science demo of the stress response, not a real lie detector.

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A rhythm game guitar on a Pro Micro in three short lessons: frets and a strum bar that never double-strums, a whammy and star power, and your own config.

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Sim racing pedals on a Pro Micro in three short lessons: a load cell brake on an HX711, a hall throttle and a pot clutch, and the curve that makes it feel right.

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A motorized camera slider on a Nano in three short lessons: homing a stepper, an eased video move, and a timelapse that settles before every shot.

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The classroom course, week by week: a loop on a breadboard through to a board talking over serial.

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